The TabCenter extension is using "resource://tabcenter/skin/..." for the styling.
This should be changed into "chrome://tabcenter/skin..." in order to allow themes to support TabCenter.
This is required to allow keeping Firefox and its new features open for themes (such as Walnut, Nautipolis, FT DeepDark, FXChrome, etc.
The TabCenter extension is using "resource://tabcenter/skin/..." for the styling. This should be changed into "chrome://tabcenter/skin..." in order to allow themes to support TabCenter.
This is required to allow keeping Firefox and its new features open for themes (such as Walnut, Nautipolis, FT DeepDark, FXChrome, etc.